Shell Programming and Scripting

[oracle@server]$ cat t.ksh
#!/bin/ksh

set -x

sid=$1
sid_cnt=$(ps -ef|grep -w "$sid"|grep -v "grep"|wc -l)
echo $sid_cnt
if [ $sid_cnt -eq 0 ];then
        echo "sid not runing"
        exit 1
else
        echo "sid running"
fi

[oracle@server]$ ksh t.ksh abc
+ sid=abc
+ ps -ef
+ grep -w abc
+ grep -v grep
+ wc -l
+ sid_cnt=1
+ echo 1
1
+ [ 1 -eq 0 ]
+ echo 'sid running'
sid running

[oracle@server]$ sid=abc
[oracle@server]$ ps -ef|grep -w "$sid"|grep -v "grep"|wc -l
0

sid_cnt=$(ps -ef|grep -w "$sid"|grep -v "grep" | grep -v "ksh" |wc -l)

ksh t.ksh ab[c]

#!/bin/ksh

#set -x

sid=$1
sid_cnt=$(pgrep -x "$sid" | wc -l)
#echo $sid_cnt
if [ $sid_cnt -eq 0 ];then
        echo "$sid not runing"
        exit 1
else
        echo "$sid running"
fi

ps -ef|grep -wc ab[c]

ksh t.ksh "ab[c]"

ps -ef|grep -wc "ab[c]"